Screen and storage-bin for asphalt.



No. 816,229. PATENTED MAR. 27, 1906. P. A. HBTHERINGTON.

SCREEN AND STORAGE BIN FOR ASPHALT.

APPLIOATION FILED PEB.29, 1904.

2 SHEETSSHEBT 1.

lill' 12 amvewioz Frederick A.Hether1ngton Qbtmu FREDERICK A.HETHERINGTON, OF INDIANAPOLIS,

INDIANA.

SCREEN AND STORAGE-BIN FOR ASPHALT.

Specification of Letters Patent.

Patented March 27', 1906.

Application filed February 29,1904. Serial No. 195,855.

T0 to whom 7.75 may concern:

Be it known that I, FREDERICK A. Hn'rn- ERINGTON, a citizen of theUnited States, residing at Indianapolis, in the county of Marion andState of Indiana, have invented certain new and useful Improvements inScreens and Storage-Bins for Asphalt, of which the following is aspecification.

In the manufacture of asphalt pavements at least two courses of asphaltare laid down, the upper or topping course being of finer ma terial thanthe lower or binder course. The same plant is used for the production ofboth these courses; and the object of my invention is to provide astorage-bin and screen construction by means of which the parts may bereadily converted for use in connection with the production of eithercourse.

A further object of my invention is to pro vide a construction in whichthe storage-bin screen may be supported upon a horizontal shaft insteadof being supported, as heretofore, upon an inclined shaft, thus makingit possible to drive the storage-bin screen by a direct chain-drive andavoiding the usual train of belts and gearing.

The accompanying drawings illustrate my invention.

Figure 1 is an elevation of that portion of an asphalt plant lyingimmediately above a driveway which passes beneath the mixer, with theadjacent portions of the sand-drying apparatus on one side and themelting-kettles upon the other. Fig. 2 is an elevation, on an enlargedscale, of the storage bin and screen; and Fig. 3 a partial section online 3 3 of Fig. 2. is: In the drawings, indicates a driveway formedtransversely of the plant between the sand-drying drums 11 on one sideand the melting-kettles 12 upon the other. Bridgingv the driveway is aplatform 13, upon which is supported the mixer 14. Arranged above themixer 14 is a suitable storage-bin 15, having at its lower end a usualor desired form of measuring-spout 16. Leading up from drier 11 is asand-elevator 17, provided with a discharge-spout 18, (preferably of theform described and claimed in my copending application, Serial No.195,857

The moving parts of the hot-sand elevator 17 are driven in any suitablemanner, as indicated in dotted lines, and the upper shaft thereof isprovided with a sprocket-wheel 19. The discharge-spout 18 leads directlyinto a drum 20, which is arranged in the upper end.

of the storage-bin with its axis parallel with the axis of the hot-sandelevator. The lower side of drum 20 is provided with a discharge-opening21, leading directly into bin 15, and its opening is closed by a slidingdoor 22, connected by a pitman 23 with an arm 24, carried at the upperend of a shaft 25. The lower end of shaft 25 is brought down far enoughto be within easy reach of the platform 13 and is provided with asuitable handwheel 26, by means of which it may be rocked. Extendingthrough drum 20 and substantially in the axis thereof is a shaft 27,which is supported in suitable substantial horizontal bearings 28,supported on the storagebin 15. Shaft 27 is provided at one end with asprocket-wheel 29, arranged in line with sproeket-wheel 19. Thesprocket-wheel 29 is preferably mounted on shaft 27 and maybe connectedtherewith or disconnected therefrom by means of a clutch 29, which maybe shifted by means of a hand-shaft 29" connected therewith andextending down to a point within convenient reach from platform 13, sothese two sprockets may be connected by a suitable chain or other belt30. (See dotted lines in Fig. 1.) Mounted upon shaft 27 and rotatabletherewith within drum 20 is a suitable feed flight or screw 31, whichoperates to discharge material from the inner or open end of drum 20into the smaller end of a conical screen 32, which is secured to shaft27 with its smaller end overlapping the inner end of drum 20. Locatedbeneath the larger open end of the screen 32 is a gravel-discharge spout33, which discharges from one side of the storage-bin 15. It will benoticed that by the use of the conical screen instead of a cylindricalscreen, as has heretofore been used, I am enabled to place shaft 27parallel with the upper shaft of the sand-elevator, and thus connectthese two shafts directly by a single belt, thus avoiding thecomplication train of gearing and also avoiding the necessity ofthrust-bearings on the screen-shaft.

In operation, if binder course is to be produced, where broken stone orother material is to be used the operator rocks shaft 25, so as towithdraw door 22 and open 21. The screen-shaft is then disconnected fromthe driving parts by shifting clutch 29 and turned so as to placefeed-screws 31 in a position where it will not prevent a direct flowfrom spent 18, through drum 20, and out of opening 21 directly into thestoragebin.

When topping course is desired, the operator has merely to return door22 to its normal position and connect shaft 27 to the driving parts byreturning clutch 29, whereupon the material is fed from drum 20 into thesmaller end of the conical screen 32, where by reason of a downwardinclination of the lower side the material runs toward gravel-chute 33,the finer sand passing through the screen in the storage-bin, while thegravel passes into the chute 33.

I claim as my invention- 1. The combination, with an endless-beltsand-elevator and a storage-bin to which said elevator delivers, of aconical screen rotatably mounted upon a substantially horizontal axisand interposed between the discharge end of said elevator and said binto receive material from said elevator, the aXis of said screen beingsubstantially parallel with the axis of the upper end of the elevator, adirect belt-driving connection between said elevator and screen, andmeans for deflecting the flow of material from said elevator directlyinto the storage-bin.

2. In an asphalt plant, the combination with a sand-elevator andstorage-bin, of a receiving-drum arranged between the storagebin andelevator, a connection between said elevator and said receiving-drum, aconical screen rotatably mounted adjacent said receiving-drum with itssmaller end overlapin the same and feedin means arran ed within thedrum, a door arranged to close an opening in the bottom of saidreceiving drum, and means for moving said door.

In witness whereof I have hereunto set my hand and seal, atIndianapolis, Indiana,

this 23d day of February, A. D7 1904.

FREDERICK A. HETHERINGTON. [L 8.]

Witnesses: ARTHUR M. HooD,

JAMES A. WALSH.

